Ivermectin
Ivermectin is a medication used to treat many types of parasite infestations. In humans, this includes head lice, scabies, river blindness (onchocerciasis), strongyloidiasis, trichuriasis, ascariasis, and lymphatic filariasis. In veterinary medicine, it is used to prevent and treat heartworm and acariasis, among other indications. It can be taken by mouth or applied to the skin for external infestations.
Common side effects include fever, itching, and skin rash when taken by mouth, and red eyes, dry skin, and burning skin when used topically for head lice. It is unclear if it is safe for use during pregnancy, but is probably acceptable for use during breastfeeding. It belongs to the avermectin family of medications. It works through many mechanisms of action that result in death of the targeted parasites.
This is smart recreation that only targets parasites and all else that elicits a response.
On its own the side effects are
Serious adverse events following ivermectin treatment are more common in people with very high burdens of larval Loa loa worms in their blood. Those who have over 30,000 microfilaria per milliliter of blood risk inflammation and capillary blockage due to the rapid death of the microfilaria following ivermectin treatment.
One main concern is neurotoxicity after large doses, which in most mammalian species may manifest as central nervous system depression, ataxia, coma, and even death, as might be expected from potentiation of inhibitory GABA-ergic synapses
This being a recreation that targets only the parasites and other elements directly should not have these effects,
of course a massive die off of loa loa worms would be bad regardless of how they are killed as you body will have to deal with it.
The recent usage for viruses is new and it seems there are sides with either heavy support or against it.
At least here, it is presented as a safer alternative.
3 times is a good start and you can gauge how your body responds.
edit: safe for humans and animals